![Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M + Coaster : Electronics Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M + Coaster : Electronics](https://m.media-amazon.com/images/I/61igCmR8t1L._AC_SX679_.jpg)
Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M + Coaster : Electronics
![Anyone any idea why my polar H10 is presuming me dead all of a sudden it dropped off twice today and the battery is ok the device is less than a few Anyone any idea why my polar H10 is presuming me dead all of a sudden it dropped off twice today and the battery is ok the device is less than a few](https://i.redd.it/3hy6qxb443d61.jpg)
Anyone any idea why my polar H10 is presuming me dead all of a sudden it dropped off twice today and the battery is ok the device is less than a few
![Amazon.com: Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women (New) : Everything Else Amazon.com: Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women (New) : Everything Else](https://m.media-amazon.com/images/I/61x7I9X2tNL._AC_SL1500_.jpg)
Amazon.com: Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women (New) : Everything Else
![Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M + Coaster : Electronics Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M + Coaster : Electronics](https://m.media-amazon.com/images/I/61J1mSa2iuL._AC_SL1100_.jpg)